Rigid arch-bar truck.



. PATENTED JUNE 9 1903.

A. LIPSGHU-TZ. RIGID ARCH BAR TRUCK.

APPLICATION FILED JAN. 2 1903.

2 SHEETS-SHEET'I.

H0 MODEL.

No. 7301668. BATBNTED'JUNE 9, 1903- A. LIPSCHUTZQ 1 RIGID ARCHBAR'TRUGK.

APPLICATION FILED JAN. 2, 1903.

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UNITED STATES Tatented J1me 9, 1903.

ARTHUR LIPSCHUTZ, OF ST. LOUIS, MISSOURI.

RIGID ARCH- BAR TRUCK.

SPECIFICATION formingpart of Letters Patent N 0. 730,668, dated June 9,1903. Application filed January 2, 1903. Serial No. l37,506. (Nomodel.)'

To all whom, it may concern/.-

Be it known that I, ARTHUR LIPSCHUTZ, a citizen of the United States,and a resident of the city of St. Louis, State of Missouri,have inventeda certain new and useful Improved Rigid Arch-Bar Truck, of which thefollowing is a specification.

My invention relates to railroad-car trucks, and has special referenceto rigid trucks for freight-cars. Such trucks comprise rigid sides thatare composed of the arch-bars and staybars and which are provided withmeans for their rigid attachment to the journal-boxes These arch-barsides are commonly connected by channel-beams of uniform cross-sectionand between which the truck-bolster is supported upon the springs. Theserigid archbar trucks are of complicated construction, are heavy, and arecostly to manufacture.

The object of my. invention is to provide a.

rigid arch-bar truck that shall possess great rigidity, that shall be ofeconomical construction, that shall have fewer parts than the ordinarytruck, that shall be easy to assemble in manufacture and also easy torepair, and that shall be of less weight than other trucks of equalstrength.

My invention consists generally in a rigid arch-bar truck wherein thearch-bar sides of the truck are rigidly connected by transoms that areZ-shaped incross-section and which have inwardly-extendinglower'flanges, suitable means being provided between said transoms forsupporting a bolster.

My invention further consists in a rigid arch-bar truck that is providedwith parallel transoms secured to the archbars and of varyingcross-section, means being provided between said transom for the supportof the bolster; and my invention further consists in a rigid arch-bartruck wherein the arch-- bar sides of the truck are connected by twoparallel cast metal transoms that are Z- shaped in cross-section andcarry spring-seats for the bolster-springs; and myinvention furtherconsists in a rigid arch-bar truck where in the parallel transoms areprovided with inwardly extending bottom flanges in combination withspring-seats resting and secured upon said flanges at the ends of saidtransoms; and, further, my invention consists in a rigid arch-bar truckwherein the parallel transoms are provided with bolster-stops 'upon.their inner sides near their ends; and, further, my invention consistsin various constructions and in combinations of parts, all in afreight-car or rigid arch-bar truck, as hereinafter described,andparticularly pointed out in the claims.

My invention will be more readily understood by reference to theaccompanying drawings, forming a part of this specification, and inwhich Figure 1 is a side elevation of a rigid archbar truck embodying myinvention. Fig. 2 is a plan view thereof. Fig. 2 is a vertical sectionon the line at 00 of Fig. 2. Fig. 3 in an enlarged cross-section of thetruck substantially on the line L y of Fig. 2 and showing the form andconstruction of the transom in detail. Fig. 4 is a detail horizontalsection on the line z of Fig. 3. Fig. 5 is a vertical section on thelines w w of Figs. 2 and 3, the bolster being removed. Fig. 6 is ahorizontal section of one of the transoms upon a line just beneath thetop flange thereof, as upon line uof Fig. 3. Fig. 7 is a verticalcrosssection ofa modified form ofthe transom; and Fig. 8 is a similarview illustrating a further modification thereof.

As shown in thedrawings, 2 2 represent the wheels of the'truck, theaxles of which are journaled in the boxes 3.

a represents the top arch-bar, 5 the bottom arch-bar, and 6 thestay-bar. The boxes 3 are held by the usual column-bolts 7. Theessential features of my invention reside in the transom structure bywhich the two sides of the truck are joined. Thisstructure is mainlycomposed of the parallel transoms 8 8. These are preferably identical inform, but occupy reverse positions. The transoms may be simplerolled-steel Z-bars having deep webs; but I much ,prefer to employtransoms of cast-steel, whereby I am enabled to vary the cross-sectionof the Z-bars and make considerable savings in their'cost and weight. Iwill therefore describe my invention as embodied in the form which Iconsider to be the best, judged from both theoretical and commercialstandpoints.

The purpose of the transom structure is to tie the sides of the trucktogether, to guide the truck-bolster, and assist in the support of thesame and the car-body. The bolster 9 is placed between the transom, butis of less length, as it must play between the sides of the truck. Thedistance between the transsoms is practically determined by the width ofthe bolster, the bolster being wide enough at the ends to engage theinner sides of the transoms. Thebolsterissupported bysprings that arearranged beneath its ends and which are provided with seats between theends of the transoms. These spring-seats as commonly arranged involvecomplicated and heavyconstructions and, furthermore, do not materiallyincrease the rigidity of the transom structure. It is difficult toattach the same to the usual channel-shaped transoms, and when the seatsare formed integrally with the transoms the structure is made tooexpensive, too heavy, and too difficult to repair, the costs ofmanufacture and maintenance being prohibitive.

The disadvantages and objections that are inherent to other structuresare avoided in my invention, briefly, as follows: by the use of metaltransoms that are provided with integral inwardlyextending flanges 10 10at their lower edges and ends to receive and sustain the spring-seatsand by the use of metal transoms that are separately secured to thearch-bars of the truck and which are identical in form and construction,and are therefore reversible, and by use of metal transoms of arch formand by the use of spring-seats, which though separable from the transomsserve to rigidly connect the same together and with the lower arch-barswhen built into the structure.

Referring to the drawings, it will be seen that each transom in itspreferred form is an integral steel casting. Each comprises a verticalWeb, which is of much greater depth at the end portions 8 than in themiddle portion 8 of the transom. Less strength is required at the middleof the transom than at the ends, and its lower part may therefore be cutaway or reduced. The top flange 11 of the transom extends outwardly andafiords the necessary strength without interfering with the bolster. Thelower flanges 10 at the ends of the transom extend inwardly, asexplained, and thus the transom is made substantially Z-shaped incross-section. The lower flanges 10 may, if desired, extend from end toend of the transom, as shown in Figs. 2 and 3. In this case the highestportions of the bottom flanges 10 will not interfere with the depressionof the bolster between the transomthat is, the bolster-springs whencompletely collapsed by the full depression of the bolster will serve tostop the bolster before its upper flanges reach the tops of theflange-arches 10. The inner sides of the tran-' soms are provided withintegral vertical ribs or stops 12, which permit the vertical movementof the bolster, but prevent endwise movement thereof between thetransoms. These take the place of the end stops that are usuallyarranged between the transoms at the ends of the bolster.

13 13 are two short spring seats or plates, which rest upon the flanges10 between the ends of the parallel transoms. These are bolted orriveted to the flanges 10, as shown, and may, if desired, be providedwith vertical side flanges secured to the webs of the transoms. Thesespring-seats 13 extend outwardly over the lower arch-bars and areriveted or bolted thereto, as well as to the transoms, giving greatrigidity to the structure, which at each end is made up of the archbars,the transoms, and the spring seat or plate all firmly riveted or boltedtogether. The bolster-springs 14 rest upon the springpiece 13 and are.held in place by suitable bosses 15, provided on the upper surfaces ofthe spring-seats. The spring-seats are preferably steel castings thathave flanges 16 to fit over the lower arch-bars. They are also providedwith strengthening-ribs 17 on their under surface.

The bottom flanges 10 of the transoms may be preserved for the fulllength of the transoms and yet not extend beneath the wide middleportion of the bolster. Such forms are shown in Figs. 7 and 8, where thebottom flange 10 is shifted outwardly to be partly or wholly upon theouter side of the transom along the middle portion thereof. In short,any suitable disposition may be made of the metal at the middle of thetransom, so long as the Z-section shapes are preserved at the ends ofthe transom.

It is obvious that numerous modifications of my invention Will readilysuggest themselves to one skilled in the art, and I therefore do notconfine my invention to the specific constructions herein shown and described.

Having thus described my invention, I claim as new and desire to secure.by Letters Patent 1. The parallel transoms, comprising the metal barsprovided at their ends with inwardly-extending bottomflanges andoutwardly-extending top flanges, in combination with the spring-seatsresting upon said flanges and rigidly connecting said bars,substantially as described.

2. The parallel metal transoms, Z-shaped in cross-section, withinwardly-extending bottom flanges and outwardly-extending top flanges,in combination with the top and bottom arch-bars, whereto said transomsare rigidly secured, and the spring seats or plates secured upon thebottom arch-bars and extending inwardly upon said bottom flanges, atopposite ends of the transoms, substan tially as described.

v 3. In a rigid arch-bar car-truck, the truck arch-bars, in combinationwith the parallel cast-steel transoms of varying cross-section andprovided with inwardly-extending bottom flanges and outwardly-extendingtop flanges, said transoms at their ends being secured to said arch-barsand the spring-seats secured upon said flanges and to the bottomarch-bars, substantially as described.

4. The parallel cast-steel transoms of varying cross-section, providedwith outwardlyextending top flanges and with continuous bottom flangesthat extend inwardly at the ends of the transoms, in combination withthe spring-seats and the arch-bars.

5. In a rigid arch-bar truck, the combination of the arch-bars with theparallel caststeel transoms, secured to said arch-bars and provided withvertical ribs or bolster-stops on their inner sides, said transomshaving outwardly-extending top flanges and inwardlyextending bottomflanges, the spring-seats secured upon said bottom flanges between theCHAS. AHIDDLE, IRA J. PERRY.

